patch 9.0.1279: display shows lines scrolled down erroneously
Problem: Display shows lines scrolled down erroneously. (Yishai Lerner)
Solution: Do not change "wl_lnum" at index zero. (closes #11938)
diff --git a/src/testdir/dumps/Test_move_undo_1.dump b/src/testdir/dumps/Test_move_undo_1.dump
new file mode 100644
index 0000000..71e3120
--- /dev/null
+++ b/src/testdir/dumps/Test_move_undo_1.dump
@@ -0,0 +1,10 @@
+|S+0&#ffffff0|e|c|o|n|d| @53
+>F|i|r|s|t| @54
+|T|h|i|r|d| @54
+|F|o|u|r|t|h| @53
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+|:+0#0000000&|m|o|v|e| |+|1| @33|2|,|1| @10|A|l@1|
diff --git a/src/testdir/dumps/Test_move_undo_2.dump b/src/testdir/dumps/Test_move_undo_2.dump
new file mode 100644
index 0000000..ff0bc1a
--- /dev/null
+++ b/src/testdir/dumps/Test_move_undo_2.dump
@@ -0,0 +1,10 @@
+>F+0&#ffffff0|i|r|s|t| @54
+|S|e|c|o|n|d| @53
+|T|h|i|r|d| @54
+|F|o|u|r|t|h| @53
+|~+0#4040ff13&| @58
+|~| @58
+|~| @58
+|~| @58
+|~| @58
+| +0#0000000&@41|1|,|1| @10|A|l@1|
diff --git a/src/testdir/test_move.vim b/src/testdir/test_move.vim
index 98c7665..0412097 100644
--- a/src/testdir/test_move.vim
+++ b/src/testdir/test_move.vim
@@ -1,5 +1,8 @@
" Test the ":move" command.
+source check.vim
+source screendump.vim
+
func Test_move()
enew!
call append(0, ['line 1', 'line 2', 'line 3'])
@@ -43,4 +46,25 @@
%bwipeout!
endfunc
+func Test_move_undo()
+ CheckRunVimInTerminal
+
+ let lines =<< trim END
+ call setline(1, ['First', 'Second', 'Third', 'Fourth'])
+ END
+ call writefile(lines, 'Xtest_move_undo.vim', 'D')
+ let buf = RunVimInTerminal('-S Xtest_move_undo.vim', #{rows: 10, cols: 60, statusoff: 2})
+
+ call term_sendkeys(buf, "gg:move +1\<CR>")
+ call VerifyScreenDump(buf, 'Test_move_undo_1', {})
+
+ " here the display would show the last few lines scrolled down
+ call term_sendkeys(buf, "u")
+ call term_sendkeys(buf, ":\<Esc>")
+ call VerifyScreenDump(buf, 'Test_move_undo_2', {})
+
+ call StopVimInTerminal(buf)
+endfunc
+
+
" vim: shiftwidth=2 sts=2 expandtab